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ASTM D6677-01

(Test Method)

Standard Test Method for Evaluating Adhesion by Knife

Standard Test Method for Evaluating Adhesion by Knife

SCOPE
1.1 This test method covers the procedure for assessing the adhesion of coating films to substrate by using a knife.
1.2 This test method is used to establish whether the adhesion of a coating to a substrate or to another coating (in multi-coat systems) is at a generally adequate level.Note 1
The term "substrate" relates to the basic surface on which a coating adheres (may be steel, concrete, etc. or other coating).
1.3 This method can be used in the laboratory and field.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
09-May-2001
ICS
19.040 - Environmental testing
25.220.01 - Surface treatment and coating in general
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.46 - Industrial Protective Coatings
Current Stage
Ref Project

Relations

Replaced By
ASTM D6677-07 - Standard Test Method for Evaluating Adhesion by Knife
Effective Date
01-Jul-2007
Referred By
ASTM D7230-06(2021) - Standard Guide for Evaluating Polymeric Lining Systems for Water Immersion in Coating Service Level III Safety-Related Applications on Metal Substrates
Effective Date
10-May-2001
Referred By
ASTM D5163-16(2021) - Standard Guide for Establishing a Program for Condition Assessment of Coating Service Level I Coating Systems in Nuclear Power Plants
Effective Date
10-May-2001
Referred By
ASTM D6943-15(2019) - Standard Practice for Immersion Testing of Industrial Protective Coatings and Linings
Effective Date
10-May-2001
Referred By
ASTM G210-13(2023) - Standard Practice for Operating the Severe Wastewater Analysis Testing Apparatus
Effective Date
10-May-2001
Referred By
ASTM D5064-16a(2021) - Standard Practice for Conducting a Patch Test to Assess Coating Compatibility
Effective Date
10-May-2001
Referred By
ASTM D4619-12(2018) - Standard Practice for Inspection of Linings in Operating Flue Gas Desulfurization Systems
Effective Date
10-May-2001
Referred By
ASTM D7167-12(2018) - Standard Guide for Establishing Procedures to Monitor the Performance of Safety-Related Coating Service Level III Lining Systems in an Operating Nuclear Power Plant
Effective Date
10-May-2001
Referred By
ASTM F3182-23 - Standard Practice for the Application of Spray-Applied Polymeric Liners Inside Pipelines for Potable Water
Effective Date
10-May-2001
Referred By
ASTM D5498-12a(2018) - Standard Guide for Developing a Training Program for Personnel Performing Coating and Lining Work Inspection for Nuclear Facilities
Effective Date
10-May-2001
Referred By
ASTM D3276-21 - Standard Guide for Painting Inspectors (Metal Substrates)
Effective Date
10-May-2001
Referred By
ASTM D5065-17(2021) - Standard Guide for Assessing the Condition of Aged Coatings on Steel Surfaces
Effective Date
10-May-2001
Referred By
ASTM D6944-15(2020) - Standard Practice for Determining the Resistance of Cured Coatings to Thermal Cycling
Effective Date
10-May-2001
Referred By
ASTM D6237-19 - Standard Guide for Painting Inspectors (Concrete and Masonry Substrates)
Effective Date
10-May-2001
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
10-May-2001

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ASTM D6677-01 - Standard Test Method for Evaluating Adhesion by KnifeASTM D6677-01 - Standard Test Method for Evaluating Adhesion by Knife
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ASTM D6677-01 - Standard Test Method for Evaluating Adhesion by Knife
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Standards Content (Sample)


NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6677–01
Standard Test Method for
Evaluating Adhesion by Knife
This standard is issued under the fixed designation D 6677; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope found useful as a simple means of assessing the adhesion of
coatings.Although this method is a qualitative and a subjective
1.1 This test method covers the procedure for assessing the
test it has been used in industry for many years and can provide
adhesion of coating films to substrate by using a knife.
valuable information.
1.2 This test method is used to establish whether the
4.2 Other adhesion test methods may be useful in obtaining
adhesion of a coating to a substrate or to another coating (in
quantitative results. See D 2197, D 3359 and D 4541.
multi-coat systems) is at a generally adequate level.
4.3 The Performance Evaluation Scale (see 7.4, Table 1) is
NOTE 1—The term “substrate” relates to the basic surface on which a
based on both the degree of difficulty to remove the coating
coating adheres (may be steel, concrete, etc. or other coating).
from the substrate and the size of removed coating.
1.3 This method can be used in the laboratory and field.
4.4 This test method does not have a known correlation to
1.4 The values stated in SI units are to be regarded as the
other adhesion test methods (pull-off, tape, etc.).
standard. The values given in parentheses are for information
4.5 A coating that has a high degree of cohesive strength
only.
may appear to have worse adhesion than one that is brittle and
1.5 This standard does not purport to address all of the
hence fractures easily when probed.
safety concerns, if any, associated with its use. It is the
5. Apparatus and Materials
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.1 Cutting Tool—Sharp utility knife.
bility of regulatory limitations prior to use.
5.2 Cutting Guide—Steel or other hard metal straight edge
to ensure straight cuts.
2. Referenced Documents
6. Test Specimen
2.1 ASTM Standards:
D 2197 Test Methods for Adhesion of Organic Coatings by
6.1 When this test method is used in the field, the specimen
Scrape Adhesion.
isthecoatedsubstrateonwhichtheadhesionistobeevaluated.
D 3359 Test Methods for Measuring Adhesion by Tape
6.2 For laboratory use, apply the materials to be tested to
Test.
panels of the composition and surface conditions on which it is
D 4541 Test Method for Pull-Off Strength of Coatings
desired to determine adhesion.
Using Portable Adhesion Testers.
NOTE 2—If desired or specified, the coated test panels may be subjected
to a preliminary exposure such as water immersion, salt spray, or high
3. Summary of Test Method
humidity before conducting the knife adhesion test.
3.1 Adhesion is determined by making an “X” cut into the
7. Procedure
coating film to the substrate and by lifting the coating with a
knife. Adhesion is evaluated qualitatively ona0to10 scale.
7.1 Select an area free of blemishes and surface imperfec-
tions.
4. Significance and Use
7.2 Using a sharp knife and cutting guide, make two cuts
4.1 Coatings, to perform satisfactorily, must adhere to the
into the coating with a 30 to 45 ° angle between legs and down
substrates on which they are applied.This test method has been
tothesubstratewhichintersectstoforman“X”.Makeeachleg
of the angle a minimum of 38.1 mm (1 ⁄2 in.) in length.
Disregard coating removed during cutting process.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
7.3 Employing the point of the kn
...

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4.1 Coatings, to perform satisfactorily, must adhere to the substrates on which they are applied. This test method has been found useful as a simple means of assessing the adhesion of coatings. Although this method is a qualitative (subjective) test it has been used in industry for many years and can provide valuable information.  
4.2 Other adhesion test methods may be useful in obtaining quantitative results. See Test Methods D2197, D3359, D4541, and D7234.  
4.3 The Performance Evaluation Scale (see Table 1) is based on both the degree of difficulty to remove the coating from the substrate and the size of removed coating chip.  
4.4 This test method does not have a known correlation to other adhesion test methods (pull-off, tape, etc.).  
4.5 A coating that has a high degree of cohesive strength may appear to have worse adhesion than one that is brittle and hence fractures easily when probed.  
4.6 This method is not to be used on overly thick coatings, that is, those which cannot be cut to the substrate with a utility knife in one stroke.
SCOPE
1.1 This test method covers the procedure for assessing the adhesion of coating films to substrate by using a knife.  
1.2 This test method is used to establish whether the adhesion of a coating to a substrate or to another coating (in multi-coat systems) is at a generally adequate level.
Note 1: The term “substrate” relates to the basic surface on which a coating adheres (may be steel, concrete, etc. or other coating).  
1.3 This method can be used in the laboratory and field.  
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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1.1 This test method covers the procedure for assessing the adhesion of coating films to substrate by using a knife.  
1.2 This test method is used to establish whether the adhesion of a coating to a substrate or to another coating (in multi-coat systems) is at a generally adequate level.
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1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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1.1 This specification covers lap cement consisting of asphalt dissolved in a volatile petroleum solvent with or without mineral or other stabilizers, or both, for use with roll roofing. The fibered version of these cements excludes the use of asbestos fibers.  
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5.1 Coefficients of linear thermal expansion are used, for example, for design purposes and to determine if failure by thermal stress may occur when a solid body composed of two different materials is subjected to temperature variations.  
5.2 This test method is comparable to Test Method D3386 for testing electrical insulation materials, but it covers a more general group of solid materials and it defines test conditions more specifically. This test method uses a smaller specimen and substantially different apparatus than Test Methods E228 and D696.  
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SCOPE
1.1 This test method determines the technical coefficient of linear thermal expansion of solid materials using thermomechanical analysis techniques.  
1.2 This test method is applicable to solid materials that exhibit sufficient rigidity over the test temperature range such that the sensing probe does not produce indentation of the specimen.  
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SCOPE
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1.3 The values of operating conditions are stated in SI units and are considered standard. The values in parentheses are the historical inch-pound units. The standardized CFR engine measurements continue to be in inch-pound units only because of the extensive and expensive tooling that has been created for this equipment.  
1.4 For purposes of determining conformance with all specified limits in this standard, an observed value or a calculated value shall be rounded “to the nearest unit” in the last right-hand digit used in expressing the specified limit, in accordance with the rounding method of Practice E29.  
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific warning statements, see Section 8, 14.4.1, 15.5.1, 16.6.1, Annex A1, A2.2.3.1, A2.2.3.3 (6) and (9), A2.3.5, X3.3.7, X4.2.3.1, X4.3.4.1, X4.3.9.3, X4.3.11.4, and X4.5.1.8.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Gu...

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  • Standard
    48 pages
    English language
    sale 15% off